JP2002129824A - Sliding door or partitioning device equipped with magnet suspension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding door or partitioning device equipped with a magnet suspension device allowing miniaturization of the suspension device, and easily mountable on a sliding door or movable partition. SOLUTION: A rail 5 consisting of magnetic body is set on the lower surface of a head jamb 2 forming the opening part of a building skeleton, and the suspension device consisting of the combination of a magnet 7 for supporting the weight of a door with a roller 9 is installed to the upper end of the sliding door 1 or movable partition. The magnet of the suspension device is isolated from the magnetic body of the head jamb by the roller to prevent direct attraction thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension system.

[0002]

2. Description of the Related Art A first example of a well-known sliding door suspension system is shown in FIG. As a second example, FIG.
The method of magnet suspension shown in FIG. Hereinafter, the example of FIG. 12 will be described with reference to the drawings. At the lower end of the opening of the building frame, the gate 6 is fixed, and at the lower end of the gate, the magnetic body 4 is fixed as a rail. A magnet 3 is installed near the center of the upper end of the sliding door 1, and a roller is fixed to the sliding door 1 so that the upper end of the roller is located above the upper end of the magnet 3. The magnet 3 attracts the magnetic body 4 so that the sliding door 1
However, since the roller is positioned above the magnet, the magnet and the magnetic body do not come into contact with each other, and there is no friction due to having a space (hereinafter referred to as a gap). When a force is applied to the sliding door 1 by a passerby, the rollers roll and the sliding door 1 moves.

[0003]

In the first example of the generally known sliding door shown in FIG. 18, the distance from the upper end of the sliding door to the lower end of the opening of the skeleton is determined by the diameter of the hanging roller and the rail. There is a problem that requires a large space of the sum of the attached size and the extra space. In addition, in order to construct the suspension device, a method of fixing the sliding door or the movable partition to the roller with the roller incorporated in the rail, and fixing the sliding door or the movable partition to the movable roller is required. The problem is that it takes time.

In the sliding door shown in the second example, the weight of the sliding door or the movable partition is supported by the attraction force of the magnet 3 and the magnetic body 4. At this time, a force obtained by subtracting the weight of the door 1 from the attractive force of the magnet and the magnetic material is applied to the two rollers in the upward direction. The magnetic body 4 is supported by two rollers, and a bending force is applied between the magnet 3 and the magnetic body 4 to give a bending force to the magnetic body 4. In order to obtain the required rigidity, there is a problem that the size becomes large.

A magnet is installed above the sliding door or movable partition, and a magnetic material is installed at the lower end of the opening of the skeleton, whereby the sliding door or movable partition is drawn by the attractive force between the magnet and the magnetic material. The rigidity required for the magnetic body is alleviated by utilizing a magnet suspension in which the weight of the magnet is suspended and disposing the magnet and the rollers of the magnet suspension near each other.
Also, by installing a detachable magnet suspension device combining a roller and a magnet near the upper edge of the sliding door or movable partition, the magnet suspension device can be downsized, and a magnet that facilitates the construction of the sliding door or movable partition. A suspension is provided.

[0005]

Embodiments of the present invention will be described with reference to the accompanying drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the first and second aspects will be described with reference to FIGS. FIG. 1 shows an example in which a detachable magnet suspension device is installed at both ends of an upper part of a sliding door. FIG. 3 is a sectional view showing details of the detachable magnet suspension device. FIG.
FIG. 6 is a front view showing an example in which a magnet for suction is arranged near the center of the upper part of the sliding door, and rollers are arranged near both sides of the magnet. This example shows an example of a magnet suspension sliding door. A magnet 5 having a magnetic body 5 serving as a rail is fixed to the lower end of the gate 2 installed at the lower end of the opening of the building frame. The upper end of the sliding door 1 has a roller 9 as a rotating body and a magnet 7 for attraction at both edges. The suspension device case 6 is installed. The weight of the sliding door 1 is suspended by the attraction between the magnet 7 and the magnetic body 5, and the roller 9 is suspended by the attraction.
Contacts the magnetic body 5. The upper end of the roller 9 is arranged above the upper end of the magnet 7, and a gap is provided between the magnet 7 and the magnetic body 5. The roller 9 rolls on the lower end surface of the magnetic body 5 by the force applied to the sliding door 1 so that the sliding door 1 moves. Roller 9 is positioned close to magnet 7
Is disposed, the magnetic body 5 is pulled downward by the attraction force of the magnet, and is supported by the two rollers 9, so that the magnetic body 5 exerts a bending force. By disposing the rollers 9 near both sides of the magnet 7, the distance between the two rollers is shortened, so that the rigidity required for the magnetic body 5 is small, and the shape of the magnetic body 5 can be reduced. It has the feature that it can be smaller than the example.

One embodiment of the third and fifth aspects of the present invention will be described with reference to FIGS. The magnetic poles of one or a plurality of magnets 7 are arranged in the horizontal direction, and the yoke 22 made of a magnetic material is arranged so as to be in close contact with both magnetic poles. A shaft 23 made of a non-magnetic material is provided near both ends of the magnet in a direction perpendicular to both poles.
Thereby, the yoke is freely rotatably engaged with the yoke. A convex portion 33 is provided at the center of the lower end of the yoke, and the adjustment lever 26 is rotatably mounted on the convex portion via the moving shaft 32. Fixed shaft 2 fixed to case 6
The lever 26 is rotatably engaged with the case 6 about a fixed shaft 28. A shaft 29 having a centrally threaded hole is rotatably mounted on the lever 26. The case 6 is provided with a vertically long elliptical hole in the fore-edge direction at the position of the case 6 opposite to the position of the shaft 29, through which the adjusting screw 30 passes through the spring 31 into the screw hole of the shaft 29. Have been. In this example, an example in which one magnet is used has been described. However, a method in which the required attraction force is determined by the number of magnets by dividing and using a plurality of magnets is also effective.

A fixing base 23 is fixed to the sliding door 1 by screws 24. A groove is provided at the upper end of the fixing base 23, and the case 6 is fixed by slidingly engaging with a protrusion provided at the lower end of the case 6.
Since this fixing method is not the subject of the present invention, further detailed description is omitted. An upward attractive force is generated by the magnet 7, the yoke 22, and the magnetic body 5, and the sliding door 1 is supported by the roller 9 being in contact with the magnetic body 5. By rotating the screw 30 clockwise, the shaft 29 is drawn to the fore edge, and the lever 26
Rotates about the fixed shaft 28, and the moving shaft 25 moves downward. Since the moving shaft 25 is coupled to the yoke 22 via the projection 27 at the lower end of the yoke 22, the case 6 moves upward with respect to the magnetic body 5. When the screw 30 is turned counterclockwise, the case 6 moves downward. According to the present invention, it is possible to provide a compact, easy-to-work, and low-cost overhead suspension type magnet suspension device that can be configured vertically. As an example, an up-down adjustment mechanism using a lever has been described. However, the adjustment mechanism can be configured using a cam or other methods. Further, in this example, an example in which the roller is a rotating body has been described. However, a movable suspension can also be realized by using a sphere shown in FIG. 15 as a rotating body, and the present invention provides a magnet suspension apparatus using a spherical rotating body. including.

An embodiment of the invention according to claim 4 is shown in FIGS.
This will be described with reference to FIG. The attraction magnet 7 is set at the upper end of the movable partition, and a rotatably supported sphere 194 is set near the magnet. The upper end of the sphere is located above the upper end of the magnet device. Partition 1 by magnetic material 5 installed at the lower end of the ceiling and the attraction force of the magnet
And a suspension device that can freely move on the lower surface of the magnetic body 5 by rolling the ball 194.
A configuration example using a sphere is shown in FIGS. Since the rotating mechanism of the sphere is not the subject of the present invention, a detailed description is omitted.

An embodiment of the invention will be described with reference to FIG. A magnet 7 having a flat shape and magnetic poles magnetized in the thickness direction is closely fixed to the bottom of a concave portion of a yoke 22 made of a magnetic material having a concave portion wider than the magnet at a depth equivalent to the thickness of the magnet. . If the distance between the side surface of the magnetic body and the magnet side surface is wider than the gap between the magnet device and the magnetic body of the attraction partner, a stronger attraction force is obtained. A magnet device for a suspension device having a stronger attraction than a magnet alone can be provided.

An embodiment of the present invention will be described with reference to FIG. In a means that uses a suction force with a gap without having a magnetic body and a magnet device adhere to each other, which is necessary as a suspension device, a stronger attractive force is required if the magnet and the magnetic material used for suction have a large area facing each other. available. The magnet 7 magnetized in the thickness direction is fixed to a step equivalent to the thickness of the flat magnet 7 and to the lower upper surface of the yoke 22 having the upper and lower steps having the same or larger area as the flat surface of the magnet. As shown in the figure, the larger the distance between the side surface of the magnet 7 and the upper stage of the yoke 22, the stronger the attraction force.

An embodiment of the present invention will be described with reference to FIG. Two magnets 7 magnetized in the thickness direction in a flat shape in which both magnetic poles are magnetized in the thickness direction, one magnet is brought into close contact with the yoke 22 and the N pole, and the S pole of the other magnet is made a yoke. 22
And magnet device in close contact. Arranging two magnets at an interval is also an effective means for obtaining a stronger attractive force. In this example, an example using two magnets has been described. However, any number of magnets may be used, and a magnet having a number or a magnet area corresponding to a required attractive force may be used.

FIG. 16 and FIG.
This will be described with reference to FIG. A protective member 71 made of a magnetic material having a width equal to or wider than the upper opening of the attraction magnet 7 and the yoke 22 is brought into close contact with the attraction force of the magnet. Constructing a closed magnetic path at the same time as protecting the unnecessary objects from being attracted prevents the magnets from being demagnetized.

An embodiment of the present invention will be described with reference to FIGS. A guide groove 102 is formed at the lower end of the sliding door 1. A guide pin 103 is inserted into the guide pin base 105 at a position facing the guide groove in the upper part of the floor, and the sliding door 1 is moved by a force applied from the side surface of the sliding door 1.
Regulates movement. By providing a hanging member 101 fixed at a wider interval than the thickness of the sliding door 1 to the gate 2, the upper part of the sliding door 1 is restricted from moving by a force applied from the side surface of the sliding door 1. In the construction of the sliding door 1, the upper part of the sliding door 1 is inserted between the hanging members 101 on both sides of the sliding door at the position of the sliding door 1 indicated by the broken line, with the guide pin 103 removed.
Is vertically inserted into the guide groove 102 at the lower end of the sliding door 1, and the guide pin 103 is mounted on the guide pin base 105. The above construction is made possible by making the guide pin 103 detachable.

An embodiment of the present invention will be described with reference to FIG. The weight of the sliding door 1 is supported by the attraction force of the magnetic body 5 and the magnet 7, and the sliding door 1 is movably suspended by a roller 9 contacting and rolling with the magnetic body 5. In order to prevent the roller 9 and the magnetic body 5 from sliding due to the force applied from the side surface of the sliding door 1, the sliding door 1 is drooped from the lower end of the opening of the building frame to both sides of the sliding door 1 with an interval exceeding the thickness of the sliding door 1. A member 101 is provided. The lower end of the hanging member 101 is lower than the upper end of the sliding door 1 <
L1> is set below. When the sliding door 1 is suspended, the distance between the lower end of the sliding door 1 and the floor upper surface is <L2>, and L1 is set to be larger than L2 so that the sliding door 1 is moved in the side direction. And at the same time, restricts the sliding door 1 from falling when the sliding door 1 falls.

An embodiment of the present invention will be described with reference to FIG. The hanging member 101 is fixed to the Kamoi 2. In addition, the hanging member 10 has a width larger than the width of the sliding door 1.
2 is installed detachably. The swing of the lower end of the sliding door due to the force from the side surface of the sliding door 1 is regulated by the guide pin 103, and the swing of the upper end of the sliding door is regulated by the hanging member. Since the hanging member 102 is detachable, it is possible to provide a magnet suspension device that can be installed on the sliding door 1 when the hanging member 102 is not mounted and the guide pin 103 under the sliding door is installed.

An embodiment of the present invention will be described with reference to FIG. At the upper edge of the sliding door 1, a case 6 of a suspension device in which a magnet for suction and a roller for movement are combined is installed at both edges. A magnetic body 5 is installed at the lower end of the gate, and the sliding door 1 is installed so as to be freely movable in the left-right movement direction by the suspension device.

A pulley 123 is installed at the same height as the upper end of the sliding door 1 in the vertical frame 3, and a wire fixing pin 125 is installed near the door end of the sliding door 1. One end of the wire 122 is fixed to the wire fixing pin 125, and the weight 121 is connected to the other end of the sliding door 1 via the pulley 123 at a length lower than the operating range of the sliding door 1. The weight 121 is opened when the sliding door 1 is opened to the door bottom side by a passerby.
After moving upward, the applied force is released and the sliding door 1 is automatically closed by the gravity of the weight 121.
At this time, by providing a shock absorbing device or the like before full closing, a quiet and safe closing method is possible. However, since it is different from the subject of the present invention, detailed description is omitted. According to the present invention, it is possible to provide a semi-automatic sliding door that requires a very small space above the sliding door 1. Conventionally, a combination of a rail and a roller as shown in FIG. 18 was required, and a semi-automatic sliding door requiring a large space was required. According to the present invention, a semi-automatic sliding door can be installed in a small space, and an existing manual sliding door can be easily remodeled into a semi-automatic sliding door without affecting a building frame. Although the method of installing the weight on the vertical frame on the door side shown in this example was shown, the same function is also achieved by installing a moving pulley near the rear end of the sliding door and installing a pulley and a weight on the vertical frame on the door end side. realizable.

An embodiment of the invention will be described with reference to FIG. At the upper end of the sliding door 1, a case 6 of a magnet suspension device having a built-in magnet for attracting and a roller for movement is installed at both edges. A magnetic body 5 is installed at the lower end of the gate, and the sliding door 1 is installed so as to be freely movable in the left-right movement direction by the suspension device.

A pulley 123 is installed at the same height as the upper end of the sliding door 1 of the vertical frame 124, and a wire fixing pin 125 is installed near the door end of the sliding door 1. One end of the wire 122 is fixed to the wire fixing pin 125, and the length of the sliding door 1 is longer than the operating range of the sliding door 1 downward from the pulley via the pulley 123.
The other end of 31 is fixed to vertical frame 124. When the sliding door 1 is opened to the side of the door by the passerby, the spring 132 is stretched, the applied force is released, and the sliding door 1 is moved by the force of the spring 132.
Closes automatically. In this embodiment, an example of a coil spring is shown, but the same result can be obtained by using a mainspring type spring.

By using a magnet containing neodymium, boron and iron as main components, a small shape can be realized. Conventionally, a magnet made of ferrite has been used, but by using the magnet shown in this example, the weight of the sliding door or the movable partition can be suspended simply by placing the weight on a part of the upper end of the door.

[0022]

Since the present invention is configured as described above, the following effects are produced. According to the first aspect of the present invention, the suspension device is configured to be detachable independently of the sliding door or the movable partition, and by arranging the suspension at the upper two small openings of the sliding door or the movable partition, the installation is completed only by processing on both small openings. Costs can be reduced.

According to the second aspect of the present invention, the attraction force varies depending on the distance between the magnet and the magnetic material. However, rollers are provided on both sides of the magnet, and the upper end of the roller is disposed above the upper end of the magnet. In addition, the distance between the magnetic body and the magnet is always constant, and the attraction force can be stabilized.

According to the third aspect of the present invention, the suspension of the sliding door or the movable partition can be adjusted without changing the suction force.

According to the fourth aspect of the invention, by making the supporting rotating body spherical, the moving direction of the suspended sliding door or movable partition can be freely set in all directions on the lower surface of the magnetic body. In particular, in a movable partition, there are many configuration examples in which not only movement in the width direction of the partition for storage but also movement in the thickness direction is required. According to the present invention, light and free movement can be realized by a suspension structure. .

According to the fifth aspect of the present invention, a larger attractive force can be obtained as compared with the case where only the magnet is used for the attraction, so that the use of a small magnet can reduce the cost. Further, by using the yoke as a fixing member for the roller shaft, the roller and the magnet device are integrated, and a structure capable of keeping the distance between the magnet and the magnetic body constant can be easily realized, and a more compact suspension device can be provided.

According to the seventh aspect of the present invention, in the suspension device using the magnet, a space is required between the attraction magnet and the magnetic body in order to enable movement, and the area of the attraction portion of the magnet is large. An element for obtaining a stronger suction force. According to the present invention, the areas of the magnet and the yoke can be increased, and the lines of magnetic force are concentrated at the intended positions by the yoke, thereby obtaining a stronger magnet device. In addition, since a smaller magnet can be used to obtain the same attractive force, low cost and space saving can be realized.

According to the eighth aspect of the present invention, the suction force can be increased by enlarging the area of the attraction portion of the magnetic material and increasing the area of the yoke.

According to the eighth aspect of the present invention, it is possible to obtain a stronger attractive force and use a plurality of magnets to set the number of magnets according to the required attractive force.

According to the ninth aspect of the present invention, by providing the protective member, it is safe to install the sliding door or the movable partition, and a closed magnetic path is formed by attracting the magnetic material to the magnet, thereby reducing the number of magnets. It has the effect of preventing magnetism.

According to the tenth aspect, the work can be performed by the detachable steady rest.

According to the eleventh aspect of the present invention, when the sliding door or the movable partition falls due to the application of a force greater than the attraction force of the magnet, the falling can be prevented.

According to the twelfth aspect of the present invention, a hanging member capable of preventing a fall is provided at an upper portion, and the construction can be performed even under a condition in which a fixed steady rest is present on the floor.

According to the thirteenth and fourteenth aspects of the present invention, a compact sliding door that automatically closes can be provided.

According to the fifteenth aspect of the present invention, a small magnet suspension device can be realized by using a strong magnet, and the magnet suspension device can be realized even in a limited volume at the upper end of the sliding door or the movable partition. A structure that could not be realized with a generally known ferrite magnet can be realized. In order to realize barrier-free floor surfaces with sliding doors or movable partitions, overhead suspension types have become mainstream, but a configuration that minimizes the effect on the building frame is required. According to the present invention, it is possible to provide a compact, inexpensive overhead sliding door or movable partition.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is a sectional view showing one embodiment of the present invention.

FIG. 3 is a sectional view showing one embodiment of the present invention.

FIG. 4 is a perspective view showing one embodiment of the present invention.

FIG. 5 is a perspective view showing one embodiment of the present invention.

FIG. 6 is a perspective view showing one embodiment of the present invention.

FIG. 7 is a front view showing one embodiment of the present invention.

FIG. 8 is a perspective view showing one embodiment of the present invention.

FIG. 9 is a sectional view showing one embodiment of the present invention.

FIG. 10 is a side view showing one embodiment of the present invention.

FIG. 11 is a perspective view showing one embodiment of the present invention.

FIG. 12 is a front view showing a conventional example.

FIG. 13 is a front view showing one embodiment of the present invention.

FIG. 14 is an enlarged sectional view of a part of FIG. 2;

FIG. 15 is a diagram of an example showing a configuration in which a sphere is used as a rotating body.

FIG. 16 is a perspective view showing one embodiment of the present invention.

FIG. 17 is a perspective view showing one embodiment of the present invention.

FIG. 18 is a side view showing a conventional example.

FIG. 19 is a sectional view showing one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sliding door 2 Kamoi 3 Door end side vertical frame 4 Door bottom side vertical frame 5 Rail 6 Housing 7 Magnet 9 Roller 22 Yoke 23 Roller shaft 24 Screw 25 Moving shaft 26 Lever 27 Projection 28 Fixed shaft 29 Axis 30 Screw 31 Spring 33 Fixed Screw 71 Protective member 101 Hanging member 102 Guide groove 103 Guide pin 104 Base plate 105 Guide pin base 121 Weight 122 Wire 123 Pulley 125 Fixing pin 131 Spring fixing pin 132 Spring 151 Housing 152 Radial bearing 153 Ball 154 Ball guide 155 Bearing 156 Bearing shaft 181 Rail 183 Roller shaft 185 Hanging member 191 Ceiling 194 Ball 195 Bearing <L1> Space 1 <L2> Space 2

Claims (15)

[Claims] 1. A magnetic body is installed at a lower end of an opening of a building frame,
A suspension system for supporting a weight of a sliding door or a movable partition by installing a magnet at an upper end of a sliding door or a movable partition, wherein the magnet suspension device is detachable from at least a sliding door or a movable partition including a magnet and a rotating body. 2. A magnetic body is installed at the lower end of the opening of the building frame,
In a suspension device that supports a sliding door or a movable partition weight by installing a magnet at a sliding door or a movable partition upper end, a rotating body is provided near both sides of the magnet, and the rotating body upper end is located above the magnet upper end. Magnet suspension. 3. A magnet suspension device comprising a fixing member for fixing a magnet and a rotating body supporting portion and a case containing the fixing member, wherein the case is detachably engaged with a sliding door or a movable partition. Is vertically movably engaged with the fixed member, thereby enabling adjustment of the hanging height of the sliding door or the movable partition without affecting the distance between the magnet and the magnetic material to be attracted. The magnet suspension device according to claim 1 or 2, wherein 4. A magnetic body is installed at the lower end of the opening of the building frame,
4. The suspension according to claim 1, wherein the rotating body has a spherical shape in a suspension device for supporting the weight of the sliding door or the movable partition by installing a magnet at the upper end of the sliding door or the movable partition. Magnet suspension. 5. An attraction magnet device wherein the NS poles of the magnet are arranged in a horizontal direction, a yoke made of a magnetic material is fixed to each of the poles of the magnet, and the magnet device whose vertical direction is a suction direction is a suction magnet device. The magnet suspension device according to claim 1, claim 2, claim 3, or claim 4. 6. An N or S pole of a magnet having a flat bottom and a concave portion having a concave portion having a depth substantially equal to the thickness of the magnet, the magnetic pole being disposed at the bottom of the concave portion of the magnetic yoke. 5. The magnet suspension device according to claim 1, wherein the magnet device is fixed to the bottom of the recess of the yoke as a magnet for attraction. 7. A magnet having a flat shape and magnetized with both magnetic poles in a thickness direction, and a magnetic body having a step substantially equivalent to the thickness of the magnet, an N or S pole of the magnet being provided at a lower portion of the step. Is fixed to the magnet device for suction. 8. A plurality of magnets having a flat shape are fixed with a yoke made of a magnetic material such that one or a plurality of magnets are fixed to S on the yoke side and N on the other, and the remaining magnets are fixed to the yoke side. N is an attracting magnet device fixed to the plane portion of the yoke with the other being S. 9. The magnet suspension device according to claim 1, wherein a protective member made of a magnetic material is provided on the upper attracting portion of the magnet. 10. A magnetic body is placed at the lower end of the opening of the building frame,
In a sliding door or a movable partition having a suspension structure that supports a weight by installing a magnet at the upper end of the sliding door or the movable partition, a swing prevention device installed at a lower end of the sliding door or the movable partition is in a state where the sliding door or the movable partition is suspended. A magnet suspension sliding door or a magnet suspension movable partition characterized by having a swing prevention device which can be detachably mounted. 11. A magnetic body is placed at the lower end of the opening of the building frame,
In a sliding door or a movable partition device having a suspension structure that supports a door weight by installing a magnet at a sliding door or a movable partition upper end portion, a hanging member is provided from the lower end of the building frame opening to the outside of the sliding door or the movable partition, and the hanging member is provided. A sliding door or a movable partition with a magnet, characterized in that the sliding door or the movable partition is prevented from falling down when the sliding door or the movable partition is on the floor surface by lowering the sliding door or the movable partition to a position below the height of the upper end of the sliding door or the movable partition. 12. A magnetic body is placed at the lower end of the opening of the building frame,
In a sliding door or a movable partition device having a suspension structure that supports the weight by installing a magnet at the upper end of the sliding door or the movable partition, the hanging member for preventing the fall when the sliding door or the movable partition falls to the floor upper surface is wider than the width of the sliding door. A magnetic suspension sliding door or a magnetic suspension movable partition, characterized in that the area is detachable. 13. A magnetic body is placed at the lower end of the opening of the building frame,
A sliding door device having a suspension structure for supporting a door weight by installing a magnet at an upper end portion of the sliding door, wherein the closing door is closed by utilizing the gravity of a weight. 14. A magnetic body is placed at the lower end of the opening of the building frame,
A sliding door apparatus having a suspension structure for supporting the weight of a sliding door by installing a magnet at an upper end of the sliding door, wherein the closing door is closed by utilizing spring tension. 15. An attraction magnet as neodymium, boron,
A magnet suspension device according to any one of claims 1, 2, 3, 4, 5, and 6, and a magnet using iron as a main component. A magnet device for suction according to claim 8.